Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
18th January 2011
- 1Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 3 : 8. Write y in terms of x.
- 2Sector Areas and Arc Lengths3 marks
A sector of a circle has radius 9 cm and angle 30°. Work out its area, to 1 decimal place.
- 3Conditional Probability3 marks
20 students study Spanish and 5 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Capture Recapture3 marks
25 voles are marked and released. Later 15 are caught, of which 5 are marked. Estimate the population.
- 5Surds2 marks
Write sqrt(32) in the form a sqrt(b), where b is as small as possible.
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